EP0833792B1 - Elastischer puffer - Google Patents

Elastischer puffer Download PDF

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Publication number
EP0833792B1
EP0833792B1 EP96910123A EP96910123A EP0833792B1 EP 0833792 B1 EP0833792 B1 EP 0833792B1 EP 96910123 A EP96910123 A EP 96910123A EP 96910123 A EP96910123 A EP 96910123A EP 0833792 B1 EP0833792 B1 EP 0833792B1
Authority
EP
European Patent Office
Prior art keywords
section
buffer
closed loop
resilient
buffer according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96910123A
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English (en)
French (fr)
Other versions
EP0833792A1 (de
Inventor
Barry Michael Frank Jarvis
Carolyn Elice Morse
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9507996.8A external-priority patent/GB9507996D0/en
Priority claimed from GBGB9522497.8A external-priority patent/GB9522497D0/en
Application filed by Individual filed Critical Individual
Publication of EP0833792A1 publication Critical patent/EP0833792A1/de
Application granted granted Critical
Publication of EP0833792B1 publication Critical patent/EP0833792B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/56—Fittings damping bouncing force in truck collisions, e.g. bumpers; Arrangements on high-riding vehicles, e.g. lorries, for preventing vehicles or objects from running thereunder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/001—Buffers for vehicles at loading stations
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
    • E01F15/02—Continuous barriers extending along roads or between traffic lanes
    • E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
    • E01F15/0407—Metal rails
    • E01F15/0415—Metal rails with pivoting members
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
    • E01F15/02—Continuous barriers extending along roads or between traffic lanes
    • E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
    • E01F15/0461—Supports, e.g. posts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R19/28—Metallic springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R2019/026—Buffers, i.e. bumpers of limited extent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R2019/266—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means using friction sufaces

Definitions

  • the invention relates to a resilient buffer and is particularly, but not exclusively, concerned with a buffer for reducing the effects of vehicular impact.
  • a resilient buffer for reducing the effect of vehicular impact is known from GB-A-112 040.
  • the preamble of claim 1 is based on this prior art.
  • the buffer is formed from a resilient material and is in U-shaped form. Limbs of the U-shape define a space between free ends thereof which closes when the buffer is subjected to sufficient impact.
  • Such an arrangement relies on the resilience of a single vertical limb of the buffer to provide the initial impact resistance. The displacement of that limb following impact is resisted only by a single flex zone at the foot of the limb between the limb and a fixing section and at which bending occurs following the impact. Only after the space closes will the other limb provide further resistance.
  • An object of the present invention is to provide an improved form of buffer.
  • a resilient buffer formed from strip-like material comprising hollow elongate first and section sections which extend transverse to each other, the first section having spaced apart limbs, and the second section also having spaced apart limbs, the spaced apart limbs of second section being joined at one pair of adjacent ends, the spaced apart limbs of the first section being joined to the respective spaced apart limbs of the second section, characterised in that the spaced apart limbs of the first on section are joined at one pair of adjacent ends, to form a closed loop, open at the sides thereof, so as to enable relative flexing to take place between the first and second sections.
  • the closed loop arrangement is advantageous as it provides a progressively increasing resistance to impact dissipating energy to all the elements of the loop.
  • the closed loop defines a plurality of flex zones about which flexing of the buffer occurs.
  • relative displacement may occur between two of such flex zones during flexing of the buffer.
  • at least one of the flex zones is formed at a juncture between the first and second sections.
  • the elongate first and second sections are arranged such that the closed loop is substantially L-shaped.
  • the flex zones are preferably defined at inboard positions on the L-shaped closed loop.
  • the L-shaped loop may comprise two spaced apart L-shaped portions and two end portions extending between ends of the two L-shaped portions.
  • the end portions comprise further flex zones.
  • the first section defines an impact section and the second section defines a fixing section.
  • the fixing section is preferably shorter than the impact section of the L-shaped loop.
  • the second section may define two fixing sections, one said fixing section being transverse to the other. An end portion between the two L-shaped portions, where provided, may form the or a second fixing section.
  • the first and second fixing sections are preferably arranged adjacent each other.
  • corners at a mid position of the L-shape are rounded and form flex zones.
  • the end portions may also be rounded at least in part.
  • the fixing section is preferably formed in a flat part of that end portion.
  • the impact section may carry an impact element such as a crash rail, a rubber bumper pad, a bumper bar or the like.
  • the loop may be substantially I-shaped.
  • the first section forms a base of the I-shape and the second section forms an upstanding web of the I-shape, two said flexible zones being formed at a juncture between the base and the web.
  • the web may form an impact section of the buffer.
  • eight flex zones are provided by the I-shaped form.
  • the I-shaped buffer may be arranged to absorb impact from both sides thereof. In that case two impact sections may be provided, one each side of the buffer. Each such impact section preferably carries an aforesaid impact element.
  • the loop of resilient material is associated with a resilient element for increasing the resistance to impact.
  • a buffer comprising a closed loop of resilient material having a fixing section and an impact section transverse to the fixing section, the loop of resilient material being associated with a resilient element for increasing the resistance to impact.
  • the resilient element may be arranged within the closed loop.
  • the resilient element may take the form of a second closed loop.
  • the closed loops may fit one within the other, preferably closely one within the other.
  • the two loops may fit frictionally one within the other. Where there is frictional contact between the two loops in that way, deflection of the buffer is arranged to generate friction between the two loops.
  • the inner closed loop may be substantially similar in shape to the outer closed loop.
  • the resilient element may comprise a length of resilient material which may frictionally engage one or more internal or external surface portions of the loop.
  • the length of resilient material may be substantially similar in shape to the closed loop.
  • the resilient element may comprise a spring extending across the closed loop, whereby deflection of the loop causes deflection of the spring thereby increasing the resistance to impact.
  • a plurality of springs may be provided.
  • a spring it may be provided in addition to a further closed loop and/or the aforesaid length of resilient material.
  • the resilient element may take the form of a resilient stop mounted on part of the closed loop and spaced from a displaceable section of the loop such that when the displaceable section has been displaced by a given amount as a result, say, of impact, the displaceable section will move into contact with the stop.
  • a plurality of the aforesaid springs may be provided so as to extend between spaced apart limbs of one section of the L-shape and spaced apart limbs of the other section of the L-shape respectively.
  • the buffer may be used in a set comprising a plurality of buffers fixed to a mounting in spaced apart manner. Where an impact element is provided, a single impact element may be common to said plurality of buffers.
  • the buffer may be mounted on a vehicle to minimise the effect of impact.
  • the buffer can help to reduce the effect of the impact of another vehicle running into the rear of the vehicle and contacting the buffer.
  • the buffer carrying vehicle is reversed towards a loading dock or bay, the buffer can nudge the dock or bay structure and the resilience of the buffer reduces the risk of damage to the vehicle or dock structure.
  • the buffer may be fixed to a wall, floor or other static support to provide impact protection.
  • a plurality of such buffers may be used to provide a highway crash barrier, the impact sections of the buffers preferably carrying horizontal crash rails common to a plurality of the buffers.
  • a rigid stop arrangement may be provided for the buffer.
  • the rigid stop may comprise a first stop surface for limiting deflection of the buffer in a first direction and a second stop surface for limiting or preventing deflection of the buffer in an opposite direction.
  • the stop arrangement may comprise a pair of rigid elongate members which are attached to a mounting at one end and which are joined together at opposite ends. The elongate members may have portions thereof which are cut away so as to leave respective stop surfaces.
  • One of the first and second sections of the buffer preferably fits within the stop arrangement so that one of the limbs thereof lies between the respective stop surfaces.
  • the rigid stop arrangement is preferably used in conjunction with the buffer when the buffer is used as a rear bumper bar mounting on a commercial vehicle.
  • the elongate members may extend downwardly from the underside of a load carrying surface of the vehicle to which the buffer is attached.
  • two buffers and respective associated rigid stop arrangements are mounted on the vehicle at spaced apart positions, the buffers carrying a common bumper bar.
  • the bumper bar extends outboard of the two buffers.
  • the length of resilient material forming the loop may be heat treated steel, such as spring steel, and may be in strip form.
  • the or each fixing section may be formed with one or more fixing holes or recesses for receiving suitable fastening means.
  • an impact member such as bumper bar may be attached to the buffer by a fastener which passes through respective apertures formed in one of the limbs of the buffer and in the resilient element, one of said apertures being larger than the other to permit relative movement to take place between the limb and the element during deflection of the buffer.
  • the buffer is of generally L-shaped form having an elongate vertical section indicated generally at 10 and an elongate horizontal section indicated generally at 12.
  • the sections 10, 12 constitute the aforesaid hollow elongate first and second sections.
  • the buffer is formed by bending a single strip of steel, such as spring steel, into the L-shaped form, the free ends of the strip (not shown) finally being joined together by welding or by some other suitable means.
  • the buffer basically comprises first and second and L-shaped portions 16, 17 which are effectively joined together by two end portions 18, 19. If desired, two or more strips of material can be welded together to form the buffer.
  • the buffer has a vertical front limb 20, a rounded first flex zone 22 inboard of the free ends of sections 10, 12, a lower horizontal limb 23 formed with spaced apart fixing apertures 24 and providing a fixing section for fixing the buffer to a horizontal surface.
  • the ends of the strip are preferably joined by welding between the apertures 24.
  • the buffer further comprises a rounded second flex zone 25 forming a lower rear corner, a flat part 26 formed with a fixing aperture 27 and a third flex zone 28 forming an upper rounded rear corner.
  • the buffer also comprises a horizontal upper limb 29, a fourth flex zone 30 inboard of the free ends of sections 10, 12, a vertical rear limb 32 and a fifth flex zone provided by the end portion 18 joining the limbs 20, 32.
  • the vertical front limb 20 and vertical rear limb 32 constitute the aforesaid spaced apart limbs of the first section 10.
  • the horizontal lower limb 23 and the horizontal upper limb 29 constitute the aforesaid spaced apart limbs of the second section 12.
  • the front vertical limb 20 carries one or more guards or crash rails 33 or, as shown in Fig 6 and in broken lines in Fig 1, a rubber bumper 36.
  • the barrier 34 or bumper 36 can be secured in position using a bolt hole 37.
  • Fig 1 shows the buffer fixed to a horizontal surface 40 by means of fixing bolts 42 which pass through the holes 24.
  • the impact force is resisted in shear by the bolts 42 and is instantaneously transmitted through the entire buffer by deflecting the vertical section 10 rearwardly in the direction of arrow I about the flex zone 22, the force travelling through the curved end portion 18, along the limb 32 causing the flex zone 30 to flex and move inwardly towards the flex zone 22 as shown in broken lines.
  • the force travels through the upper horizontal limb 29 causing it to move inwardly and downwardly as shown in broken lines, through the flex zone 28, through the flat part 29 and through flex zone 25 into the lower horizontal limb 23 which is secured by the bolts 42.
  • the buffer is advantageous over that in GB-A-2 112 040 which relies on the resistance provided by a single flex zone to resist initial impact.
  • the buffer can be fixed to a vertical surface 45 as shown in Figs 2 and 3 by means of a fixing bolt 46 passing through the hole 27.
  • buffers can be spaced apart with their vertical limbs 20 carrying a crash rail 33 common to both buffers.
  • buffers mounted on the horizontal surface 40 can also be spaced apart for carrying a common crash rail 33.
  • the buffers can be arranged singularly on a vertical surface or on a horizontal surface 40 as shown in Fig 6. In such a case, the vertical limb 20 can conveniently carry the rubber bumper 36.
  • the vertical surface 45 may take the form of a concrete parapet, wall, steel stanchion or column and may carry rubber bumpers 36 instead of the crash rail 34.
  • the horizontal surface 40 may comprise the surface of a car park, road or other surface where means for providing impact resistance is required.
  • the buffers are used individually as shown in Fig 6, the spaces between individual buffers are easily accessible to pedestrians but the buffers themselves are ideally spaced apart to prevent passage of a vehicle therebetween.
  • Figs 7 and 8 show the way in which the buffer can be fitted in an inverted manner to the rear of a vehicle such as a semi or articulated trailer bed 49.
  • the rubber bumper 36 projects beyond the end of the vehicle so as to minimise damage resulting from a rear end impact with another vehicle.
  • the buffers may carry a bumper bar 50 extending across the rear of the vehicle. Obviously, if rear end impact is made with the bumper bar 50, the impact will be absorbed by both of the buffers. It is not essential to mount the rubber bumpers 36 on the buffers. However, they are particularly useful to minimise the risk of damage due to impact.
  • the use of the buffer and bumper 36 permits the driver to nudge the dock structure with the rubber bumpers 36 enabling the vehicle to be parked tightly against the dock structure without damage to the trailer or dock structure.
  • the use of the resilient closed loop is considerably advantageous over the type of buffer described in GB-A-2 112 040 as the energy due to impact is absorbed by the buffer as a whole from the point of initial impact.
  • Figs 9 and 10 show alternative forms of the buffer to that shown in Fig 1.
  • the buffer has fixing holes 24 for horizontal fixing whereas in Fig 10, the buffer has two vertically spaced holes 27 for vertical fixing. Effectively, Fig 1 combines the fixing features of both of those buffers.
  • Fig 11 shows an alternative closed loop arrangement viewed from the side and formed from suitable strip material.
  • the buffer in Fig 11 provides a closed loop of substantially L-shaped configuration but with vertical limbs 80, 82 tapering towards each other in the downward direction as viewed.
  • the buffer of Fig 1 has an inner loop lla of material nested therein.
  • the inner loop lla is a close fit within the outer loop 11 and the two loops preferably frictionally inter-engage.
  • fixing bolts can extend through both of the loops 11, lla to secure them in position.
  • the fixing bolts may pass through holes in the outer loop 11 and oversized holes or slots in the inner loop lla whereby on deflection of the buffer as shown in broken lines in Fig 12, the two loops may slide over each other in the directions shown by the arrows S in Fig 12.
  • the horizontal section 12 of the buffer shown in Fig 12 may be fixed to the horizontal surface 40 by bolts 42 or may be fixed to a vertical surface by other appropriately placed bolts (not shown). In that case the horizontal section 12 constitutes the aforesaid fixing portion.
  • Fig 13 shows the way in which an L-shaped length of material 100 is secured to the inside of the inner loop lla with its two sections 101 and 102 in contact with the inner loop lla.
  • the fixing bolts (not shown) for holding together the inner and outer loops 11, lla also secure the element 100 in position.
  • the element 100 could be arranged externally of the loop in contact with the L-shaped section 16 of that loop.
  • the provision of the L-shaped element 100 increases further the resistance to deflection.
  • the fixing bolts passing through the two loops 11, lla may pass through slots or oversize holes in the element 100 so that the loops and the element can all move relative to each other during deflection of the buffer.
  • friction is generated between the contiguous surfaces of the outer and inner loops 11, lla and the surfaces of the element 100 which creates a damping effect.
  • Fig 14 shows the way in which the buffer of Fig 1 can be used in conjunction with a back stop 110.
  • the back stop comprises a base member 111 and a stop member 112 which extends upwardly from the base member at an acute angle.
  • the upper end of the stop member 112 is turned outwardly slightly to present a convex surface 113 directed towards and spaced from the vertical section 10 of the buffer.
  • the horizontal section 12 of the buffer may be secured to the horizontal surface 40 by bolts 42 as in Fig 12 which also pass through the base member 111 of the resilient back stop 110.
  • Significant deflection of the buffer as indicated in broken lines will bring the vertical section 10 into contact with the convex surface 113 which may then itself deflect to present additional resistance to further deflection of the buffer.
  • Figs 15 and 16 show the way in which the resilient stop 110 can be used in conjunction with the buffers shown in Figs 12 and 13.
  • the buffer shown in Fig 1 incorporates helical compression springs 120 and 122.
  • the spring 120 extends under compression between the vertical limbs of the L-shaped portions 16, 17 and the spring 122 extends in compression between the horizontal limbs of the L-shaped portions 16, 17.
  • the springs 120, 122 will be compressed further thereby providing additional resistance to buffer deflection.
  • Fig 18 shows the way in which the springs 120, 122 can be arranged within a buffer of the kind shown in Fig 12 to provide additional resistance to deflection.
  • Fig 19 shows the way in which the buffer shown in Fig 16 can incorporate springs 120, 122 to provide additional resistance to deflection.
  • Fig 20 is a view similar to Fig 17 where the helical compression springs 120 have been replaced by solid rubber or inflatable rubber elements 130, 132.
  • the element 130 is positioned between the vertical limbs of the L-shaped portions 16, 17 and the element 132 is positioned between the horizontal limbs of the L-shaped portions 16, 17.
  • the elements 130, 132 are arranged in compression between the limbs.
  • a buffer of the kind shown in Fig 12 is inverted and attached to a surface such as the chassis 140 or the underside of a load carrying section of a commercial vehicle.
  • the horizontal section 12 of the buffer is fixed to the chassis 140, for example by bolts 42.
  • the vertical section 10 carries a bumper bar 142 comprising a square cross-section tube 144 having a length of angle 146 welded to its upper surface as viewed in Fig 26.
  • the bumper bar 142 has apertures formed in opposite vertical sides thereof for receiving an elongate bolt 148.
  • the bolt 148 is formed with a reduced diameter screw-threaded section 150 which receives a nut 152.
  • the reduced diameter section 150 passes through a bore formed in the inner loop lla and the inner loop is then held securely between the nut 150 a shoulder 154 formed on a shank 156 of the bolt 148.
  • the shank 156 passes with clearance through the outer loop 11 and the bumper bar 142 is held captive between the outer loop 11 and a head 158 of the bolt 148.
  • a further bolt 160 passes through the angle 146 and passes through the loops 11, lla in the same way as the bolt 148.
  • the bolt 160 then secures the angle 146 to the buffer.
  • the clearance between the bolts 148, 160 and the edges of the apertures in the outer loop 11 permit relative movement to occur between the inner and outer loops.
  • Fig 22 shows an alternative fixing configuration for the bumper bar 142.
  • the bolt 148 is not formed with a reduced diameter portion but simply passes without significant clearance through apertures 162 and 164 in the bumper bar 142 and outer loop 11 respectively.
  • the bolt also extends through a slot or oversize hole 166 in the inner loop lla and receives a sleeve 168 over its screw threaded section 170.
  • a nut 172 is tightened against the adjacent end of sleeve 168 so as to hold the bumper bar 142 firmly against the outer loop 11.
  • the slot or oversize hole 166 allows the loops 11, lla to move relative to each other.
  • Fig 23 shows the way in which a loop of the kind shown in Fig 12 can carry a barrier rail 180 which is suitably secured to the buffer.
  • Bolts 42 can be used to secure the horizontal section 12 to a surface such as the ground and a single barrier rail 180 may be fixed at spaced apart intervals to the vertical limbs 10 of a plurality of the buffers.
  • a buffer of the kind shown in Fig 21 is attached to a mounting adaptor 190 which is itself attached to the chassis 40 or a load carrying section of a commercial vehicle.
  • the mounting adaptor 190 carries front and rear stop members 192 and 194 respectively.
  • the front stop member 192 is formed from square cross-section tubing and is welded at its upper end as viewed in the drawings to the mounting adaptor 190.
  • the front stop member 194 then extends downwardly at an acute angle to the mounting adaptor 190 and the upper and lower surfaces of the square cross-section tube are cut away at the lower end of the tube to form front travel limit stops 192a, 192b. By cutting away the upper and lower surfaces, spaced apart sides 193 remain for welding to the lower end of the rear stop member 194.
  • the rear stop member 194 is also made from square cross-section tubing and has its upper and lower surfaces cut away at the lower end to form rear limit travel stops 194a, 194b and cut away at positions 194d and 194e at the upper end.
  • the buffer and rear stop member 194 are assembled together during manufacture so that a curved section 196 of the buffer fits with working clearance between spaced apart sides 197 at the upper end of the rear stop member 194 and a vertical section 198 of the section 10 of the buffer fits with working clearance between the sides 197 at the lower end of the rear stop member 194.
  • the buffer and rear stop member 194 assembled together in that way, the upper ends of the sides 197 can then be welded to the mounting adaptor 190 and the lower ends of the sides 197 can be welded to the sides 193 of the front stop member 192.
  • the section 12 of the buffer is secured to the adaptor plate 190, for example by bolts 42.
  • the bumper bar 142 is supported by two spaced apart buffers each of which is associated with the stop members 192, 194. If the bumper bar 142 is struck from the rear, say, by a passenger vehicle, the vertical section 10 of the buffer is deflected forwardly as shown in broken lines in Fig 24 to cushion the impact. Deflection of the vertical section 10 will absorb load until it contacts the front travel limit stops 192a, 192b which absorb the remaining load. It will be appreciated that the stops 192a, 192b are substantially solid so as not to deflect. By providing such a resilient buffer arrangement, damage to a vehicle impacting the bumper bar 142 is likely to be less than if impacting a solid non-energy absorbing device fastened to the commercial vehicle.
  • the travel limit stops 194a, 194b associated with the opposite buffer will prevent the opposite end of the bumper bar 142 from moving rearwardly.
  • the height H of the buffer is approximately 610 mm (24 inches) and the width W is approximately 380 mm (15 inches) the thickness T of the vertical and horizontal limbs 10, 12 is approximately 152 mm (6 inches).
  • the thickness t of each spring loop 11, lla is approximately 8 mm (0.323 inches).
  • a single buffer loop made to those dimensions and manufactured from spring steel has been found to absorb 1170 kg (2575 lbs) when applied at a point Y 533 mm (21 inches) from the upper surface of limb 12 as viewed in Fig 24 with a deflection of 127 mm (5 inches) without damage to the spring.
  • the buffer has been found to absorb approximately 2336 kg (5150 lbs) applied at Y with a deflection of 127 mm (5 inches).
  • the buffers will rebound after absorbing impact from the rear without imparting any further damage to the impacting vehicle and without sustaining any damage to the bumper bar 142 provided that the loading applied is within the limits set out in the requirements of the above Federal Register ruling.
  • the mounting adaptor 190 can be designed and manufactured for any specific truck, trailer or other commercial vehicle whereby a completed kit comprising the buffers, bumper bar 142 and mounting adaptors 190 can be provided for a particular vehicle.
  • the mounting adaptors 190 may be L-shaped in cross-section and may be formed from high strength angle plates which can be bolted to, say, the longitudinal chassis members 140 which support a load carrying section 141 and carry road wheels 143.
  • the bumper bar 142 will be dimensioned and positioned so as to comply with the above Federal Register ruling.
  • the above dimensions of the buffer can be varied to accommodate different loading requirements.
  • the buffers shown in Figs 1, 13, 17, 18 and 20 could also be arranged in the manner shown in Figs 24 and 25.
  • loops 11, lla Whilst two loops 11, lla have been shown nested one within the other, three or more loops may be nested together depending upon the strength of buffer required.
  • the impact sections 10 thereof may be spaced apart slightly so that the outer loop 11 may deflect over a given distance before contacting the adjacent impact section 10 of the inner loop lla.
  • the L-shaped resilient element 100 may have one of its limbs spaced from an adjacent limb of a loop of the buffer.
  • the nested loops 11, lla may be a reasonably loose sliding fit one within the other instead of being a close friction fit.
  • each L-shaped buffer described Whilst the shorter section 12 of each L-shaped buffer described is shown as the fixing section and the section 10 the impact section, the longer section 10 could be the fixing section instead. In that case the shorter section 12 will be the impact section. Fixing holes may be provided in the limb 10 for the fixing bolts 42.
  • the buffer is of generally I-shaped form having a base 200, an elongate upstanding section 202 forming the web of the I-shape extending from the base and an elongate horizontal cross piece 204 extending across the top of the section 202.
  • the buffer is formed by bending a single strip of spring steel into the I-shaped form, the free ends of the strip being joined together by welding etc.
  • the base 200 of the buffer comprises a lower horizontal limb 206 providing a fixing section having fixing apertures 24 for fixing the buffer to a horizontal surface 40, such as the ground.
  • the buffer is fixed to the horizontal surface 40 by means of bolts 42 through the fixing apertures 24.
  • the buffer further comprises a first flex zone 208 bending into a left upper horizontal limb 210.
  • a second flex zone 212 forms a corner between the left upper horizontal limb 210 and a left vertical limb 214 of the upstanding section 202.
  • a third flex zone 216 forms a corner between the top of the left vertical limb 214 of the upstanding section 202 and a left lower limb 218 of the cross piece 204.
  • a fourth flex zone 220 is provided between the left lower horizontal limb 218 of the cross piece and an upper horizontal limb 222 of the cross piece 204.
  • the upper horizontal limb 222 of the cross piece is generally parallel with the lower horizontal limb 206 of the base 200.
  • a fifth flex zone 224 is provided between the upper horizontal limb 222 and a right lower horizontal limb 226 of the cross piece.
  • a sixth flex zone 228 lies between the right lower horizontal limb 226 of the cross piece 204 and the right vertical limb 230 of the upstanding section 202.
  • a seventh flex zone 232 forms a corner between the right vertical limb 230 of the upstanding section 202 and a right upper horizontal limb 234 of the base 200.
  • an eighth flex zone 236 is provided between the right upper horizontal limb 234 of the base and the lower horizontal limb 206 of the base.
  • the flex zones can flex either way to provide impact absorbtion in two directions. Deflection following application of a force F is shown by broken lines in Fig 26.
  • a barrier assembly generally indicated at 238 is carried by the buffer, on each side thereof.
  • the barrier assembly 238 comprises a barrier rail 240 mounted by means of fasteners such as bolts or rivets to a spacer block 242.
  • the spacer block 242 is mounted to a vertical limb 214, 230 of the upstanding section 202, again by means of fasteners.
  • the buffer can be used to absorb impact energy from both sides.
  • the buffer shown is particularly useful as a crash barrier between lanes of a dual carriageway or as a buffer in vehicle parking areas.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)

Claims (16)

  1. Elastischer Puffer aus Band-ähnlichem Material mit einem hohlen länglichen ersten und zweiten Bereich, die sich quer zueinander erstrecken, wobei der erste Bereich im Abstand voneinander angeordnete Schenkel (20, 32) und der zweite Bereich ebenfalls im Abstand voneinander angeordnete Schenkel aufweist, wobei die im Abstand voneinander angeordneten Schenkel des zweiten Bereichs an einem Paar von aneinander liegenden Enden (19) verbunden sind und wobei die im Abstand voneinander angeordneten Schenkel (20,32) des ersten Bereichs mit den jeweiligen im Abstand voneinander angeordneten Schenkeln (23, 29) des zweiten Bereiches verbunden sind, dadurch gekennzeichnet, daß die im Abstand voneinander angeordneten Schenkel (20,32) des ersten Bereiches an einem Paar aneinander liegenden Enden (18) eine geschlossene, an deren Seiten offene Schleife bildend verbunden sind, um eine relative Biegung zwischen dem ersten und zweiten Bereich zu ermöglichen.
  2. Elastischer Puffer nach Anspruch 1, dadurch gekennzeichnet, daß die geschlossene Schleife eine Mehrzahl von Biegezonen (22, 25, 28, 30) ausbildet, über die ein Nachgeben des Puffers erfolgt.
  3. Elastischer Puffer nach Anspruch 2, dadurch gekennzeichnet, daß eine relative Verschiebung zwischen zwei der Biegezonen (22,30) während des Nachgebens des Puffers erfolgt.
  4. Elastischer Puffer nach Anspruch 2, dadurch gekennzeichnet, daß wenigstens eine der Biegezonen (30) an einer Verbindungsstelle zwischen dem ersten und zweiten Bereich (10,12) ausgebildet ist.
  5. Elastischer Puffer nach einem der vorstehenden Ansprüchen, dadurch gekennzeichnet, daß der längliche erste und zweite Bereich (10, 12) so angeordnet sind, daß die geschlossene Schleife im wesentlichen L-förmig ausgebildet ist.
  6. Elastischer Puffer nach Anspruch 2, dadurch gekennzeichnet, daß der längliche erste und zweite Bereich (10, 12) so angeordnet sind, daß die geschlossene Schleife im wesentlichen L-förmig ausgebildet ist und die Biegezonen an einwärts gerichteten Stellen an der L-förmigen geschlossenen Schleife gebildet werden, die L-förmige Schleife vorzugsweise zwei im Abstand voneinander angeordnete L-förmige Teile (16, 17) umfasst und die zwei Endteile (18, 19) sich zwischen den Enden der zwei L-förmigen Teile (16, 17) erstrecken.
  7. Elastischer Puffer nach Anspruch 6 soweit dieser auf Anspruch 2 rückbezogen ist, dadurch gekennzeichnet, daß die Endteile (18, 19) weitere Biegezonen umfassen.
  8. Elastischer Puffer nach einem der vorstehenden Ansprüchen, dadurch gekennzeichnet, daß der erste Bereich (10) einen Stoßbereich bildet und der zweite Bereich (12) einen Befestigungsbereich bildet, der längliche erste und zweite Bereich (10,12) so angeordnet sind, daß die geschlossene Schleife im wesentlichen L-förmig ausgebildet ist und der Befestigungsbereich kürzer als der Stoßbereich der L-förmigen geschlossenen Schleife ausgebildet ist.
  9. Elastischer Puffer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die geschlossene Schleife im wesentlichen I-förmig ist, der erste Bereich vorzugsweise ein Unterteil (200) der I-Form bildet und der zweite Abschnitt einen aufrechten Steg (202) der I-Form bildet und die zwei Biegezonen (212, 232) an einer Verbindungsstelle zwischen Unterteil und Steg ausgebildet sind.
  10. Elastischer Puffer nach einem der vorstehenden Ansprüchen, dadurch gekennzeichnet, daß der Puffer mit einem elastischen Bauteil (11a) zur Erhöhung des Stoßwiderstands verbunden ist und das elastische Bauteil (lla) vorzugsweise innerhalb der geschlossenen Schleife angeordnet ist.
  11. Elastischer Puffer nach Anspruch 10, dadurch gekennzeichnet, daß das elastische Bauteil die Form einer zweiten geschlossenen Schleife annimmt (11a).
  12. Elastischer Puffer nach Anspruch 11, dadurch gekennzeichnet, daß die zwei geschlossenen Schleifen (11, lla) kraftschlüssig ineinander gefügt sind und die innere geschlossene Schleife (lla) der Form nach vorzugsweise gleich der äußeren geschlossenen Schleife ausgebildet ist (11).
  13. Elastischer Puffer nach Anspruch 10, dadurch gekennzeichnet, daß das elastische Bauteil eine Feder (120) umfasst, die sich quer durch die geschlossene Schleife (11) erstreckt, wobei ein Nachgeben der geschlossenen Schleife (11) eine Biegung der Feder (120) verursacht, womit der Stoßwiderstand ansteigt.
  14. Elastischer Puffer nach einem der vorstehenden Ansprüchen, dadurch gekennzeichnet, daß ein fester Anschlag (192, 194) vorgesehen ist, der feste Anschlag (192, 194) vorgesehen ist, um die Bewegung des Puffers zu begrenzen, der Anschlag (192, 194) vorzugsweise eine erste Anschlagsfläche zur Begrenzung de Pufferbewegung bei Biegung und eine zweite Anschlagfläche zum Begrenzen oder Vermeiden einer Bewegung des Puffers beim Rückfedern umfasst.
  15. Elastischer Puffer nach Anspruch 14, dadurch gekennzeichnet, daß der feste Anschlag eine Anschlagfläche (194b) aufweist, die sich durch die geschlossene Schleife (11) erstreckt.
  16. Elastischer Puffer nach einem der vorstehenden Ansprüchen, dadurch gekennzeichnet, daß die geschlossene Schleife (11) aus einer Bahn oder Bahnen von elastischem Bandmaterial hergestellt ist.
EP96910123A 1995-04-19 1996-04-19 Elastischer puffer Expired - Lifetime EP0833792B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GBGB9507996.8A GB9507996D0 (en) 1995-04-19 1995-04-19 Resilent buffer
GB9507996 1995-04-19
GBGB9522497.8A GB9522497D0 (en) 1995-11-02 1995-11-02 A resilient buffer
GB9522497 1995-11-02
PCT/GB1996/000949 WO1996033117A1 (en) 1995-04-19 1996-04-19 A resilient buffer

Publications (2)

Publication Number Publication Date
EP0833792A1 EP0833792A1 (de) 1998-04-08
EP0833792B1 true EP0833792B1 (de) 2000-11-02

Family

ID=26306900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96910123A Expired - Lifetime EP0833792B1 (de) 1995-04-19 1996-04-19 Elastischer puffer

Country Status (6)

Country Link
US (1) US6076871A (de)
EP (1) EP0833792B1 (de)
AU (1) AU5342396A (de)
CA (1) CA2218514A1 (de)
DE (1) DE69610835T2 (de)
WO (1) WO1996033117A1 (de)

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Also Published As

Publication number Publication date
US6076871A (en) 2000-06-20
CA2218514A1 (en) 1996-10-24
EP0833792A1 (de) 1998-04-08
DE69610835D1 (de) 2000-12-07
AU5342396A (en) 1996-11-07
DE69610835T2 (de) 2001-06-13
WO1996033117A1 (en) 1996-10-24

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